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arXiv 1811.01002math.DS
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中心维为2的部分双曲流的熵

Entropy of partially hyperbolic flows with center dimension two

Mario Roldán, Radu Saghin, Jiagang Yang

摘要:

本文研究了具有二维中心方向的部分双曲流的拓扑熵和度量熵的正则性。我们证明了拓扑熵关于流是上半连续的,并给出了一个下半连续性不成立的例子。我们还证明了如果这样的流没有不动点,那么它是熵扩张的,因此度量熵函数是上连续的,存在平衡态(和最大熵的测度),和主要的符号扩张。

英文摘要:

In this article we study the regularity of the topological and metric entropy of partially hyperbolic flows with two-dimensional center direction. We show that the topological entropy is upper semicontinuous with respect to the flow, and we give an example where the lower semicontinuity fails. We also show that if such a flow has no fixed points, then it is entropy expansive, and consequently the metric entropy function is upper semicontinuous, there exist equilibrium states (and measures of maximal entropy), and principal symbolic extensions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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